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Physicochemical Identification Characteristics of Irradiated Brown Rice, Soybean and Sesame Seeds during Storage

방사선 조사된 현미, 대두 및 참깨의 저장기간에 따른 방사선 조사여부의 이화학적 판별 특성

  • Lee, Jeong-Eun (School of Food Science & Biotechnology, Kyungpook National University) ;
  • Ahn, Jae-Jun (School of Food Science & Biotechnology, Kyungpook National University) ;
  • Kwon, Joong-Ho (School of Food Science & Biotechnology, Kyungpook National University)
  • Received : 2011.09.12
  • Accepted : 2012.01.13
  • Published : 2012.02.28

Abstract

The identification characteristics of irradiated (0.5, 1, 2, and 4 kGy) brown rice, soybean, and sesame seeds were investigated using photostimulated luminescence (PSL), thermoluminescence (TL), and hydrocarbon analysis during 12-month storage. PSL-based screening was possible for the irradiated soybean and sesame seed samples up to 6 and 12 months, respectively. The TL glow curve shape, intensity, and ratio enabled the clear dose-dependent discrimination of all the non-irradiated and irradiated samples. The TL intensity decreased during storage, but the TL glow curve did not change qualitatively, which provided enough information to confirm the irradiation treatment of the samples over the storage period. Radiation-induced hydrocarbons were found in all the irradiated samples even at 0.5 kGy, throughout the storage period. 8-Heptadecene ($C_{17:1}$) and 1,7-hexadecadiene ($C_{16:2}$) originated from oleic acid, and 6,9-heptadecadiene ($C_{17:2}$) and 1,7,10-hexadecatriene ($C_{16:3}$) originated from linoleic acid, can be used as radiation-induced markers in identifying irradiated brown rice, soybean, and sesame seeds.

Acknowledgement

Supported by : 경북대학교

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